<template>
  <div>
      <div class="date">
        <el-form :inline="true" :model="params" class="demo-form-inline">
          <el-form-item label="标题">
            <el-input
              v-model="params.title"
              placeholder="按标题查找"
              >
            </el-input>
          </el-form-item>
          <el-form-item>
            <el-button
                icon="el-icon-search"
                @click="getList(1)">
              查询</el-button>
            <el-button
                type="primary"
                icon="el-icon-plus"
                @click="add">
              增加</el-button>
            <el-button
                type="danger"
                icon="el-icon-delete"
                @click="removeMore">
              批量删除</el-button>
          </el-form-item>
        </el-form>
      </div>
      <div class="r2">
        <el-table :data="rows" stripe style="width:99%" @selection-change="handleSelectionChange">
          <el-table-column type="selection" width="55"></el-table-column>
          <el-table-column prop="img" label="图片">
            <template slot-scope="scope">
              <img style="width:40px;height:40px" v-if="scope.row.img" :src="scope.row.img" />
            </template>
          </el-table-column>
          <el-table-column prop="title" label="标题">
          </el-table-column>
          <el-table-column prop="url" label="跳转地址">
          </el-table-column>
          <el-table-column prop="status" label="是否启用">
            <template slot-scope="scope">
              <el-switch
                  v-model="scope.row.status"
                  active-color="#13ce66"
                  inactive-color="#ff4949"
                  @change="statusChange(scope.row)"
                  :active-value="1"
                  :inactive-value="0">
                </el-switch>
            </template>
          </el-table-column>
          <el-table-column label="操作" width="320">
            <template slot-scope="scope">
              <el-button
               type="primary"
               size="mini"
               icon="el-icon-edit"
               style="margin-right:16px;"
               @click="edit(scope.row)"
              >编辑</el-button>
              <el-popconfirm
                title="确定删除此数据吗？"
                @confirm="remove(scope.row)"
              >
                <el-button
                type="danger"
                size="mini"
                icon="el-icon-delete"
                slot="reference">删除</el-button>
              </el-popconfirm>
            </template>
          </el-table-column>
        </el-table>
      </div>
      <div class="all">
        <el-pagination
          @size-change="sizeChange"
          @current-change="getList"
          :current-page="params.pageNum"
          :page-sizes="[5,10, 100, 200, 300, 400]"
          :page-size="params.pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
        </el-pagination>
      </div>
      <el-dialog :title="form._id ? '修改' : '新增'" :visible.sync="dialogFormVisible" width="400px">
      <el-form :model="form" ref="form" :rules="rules" label-width="100px">
        <el-form-item label="图片" prop="img">
          <div @click="openFile" style="overflow:hidden;width:100px;height:100px;font-size:32px;border:1px dashed #ccc;text-align:center;line-height:100px">
            <img style="max-width:100%;max-height:100%" v-if="form.img" :src="form.img" />
            <span v-else>+</span>
          </div>
          <input ref="file" style="display:none;" multiple accept="image/*" type="file" @change="changeFile"/>
        </el-form-item>
        <el-form-item label="标题" prop="title">
          <el-input type="text" v-model="form.title"></el-input>
        </el-form-item>
        <el-form-item label="跳转地址" prop="url">
          <el-input type="text" v-model="form.url"></el-input>
        </el-form-item>
        <el-form-item label="类型" prop="type">
          <el-select v-model="form.type" placeholder="请选择">
            <el-option
              v-for="type in types"
              :key="type.value"
              :label="type.label"
              :value="type.value"
            >
            </el-option>
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取消</el-button>
        <el-button type="primary" @click="submit">确定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import api from '@/api'
export default {
  name: 'shouyeBanner',
  components: {},
  data(){
    return {
      ///查询参数
      params: {
        title: "",
        type: "banner",
        pageNum: 1,
        pageSize: 5,
      },
      rows: [],
      total: 0,
      dialogFormVisible: false,
      form: {
        _id: 0,
        img: "",
        type: "banner",
        url: "",
        title: "",
      },
      rules: {
        img: [{ required: true, message: "图片不能为空", trugger: "blur" }],
      },
      types: [
        { label: "轮播图", value: "banner" },
        { label: "分类区", value: "category" },
        { label: "为您推荐", value: "recommend" },
      ],
      selecteds: [
      ]
    }
  },
  methods:{
    ////修改pageSize
      sizeChange(pageSize) {
        this.params.pageSize = pageSize
        this.getList(1)
      },
      ////获取列表
    getList(pageNum){
      if(pageNum) this.params.pageNum = pageNum
      this.$http({
          url:'/admin/index',
          params:this.params
        }).then(res => {
        this.total = res.total
        this.rows = res.rows 
      })
    },
    ///启用停用
    statusChange(row){
      this.$http({
        url:'/admin/index',
        method:'PUT',
        data:{
          indexId:row._id,
          status:row.status
        }
      }).then(res => {
        if(res.errorMsg){
          this.getList(1)
        }
      })
    },
    ///删除数据
    remove(row){
      this.$http({
        url:'/admin/index',
        method:'DELETE',
        params:{indexId:row._id}
      }).then(res => {
        if(!res.errorMsg){
          this.getList(1)
        }
      })
    },
    handleSelectionChange(rows){
      ///存储选中数据
      this.selecteds = rows
    },
    ///批量删除
    removeMore(){
      ///获取选中的数据
      let checkedRowsPrmose = []
      let success = [],fail = []
      for(let i = 0;i < this.selecteds.length;i ++){
        checkedRowsPrmose.push(
          new Promise(resovle => {
            let row = this.selecteds[i]
            this.$http({
              url:'/admin/index',
              method:'DELETE',
              params:{indexId:row._id}
            }).then(res => {
              if(!res.errorMsg){
                success.push(row._id)
              }else{
                fail.push(row._id)
              }
              resovle()
            })
          })
        )
      }
      this.$confirm('此操作将删除选中的数据, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        ///删除
        Promise.all(checkedRowsPrmose).then(() => {
          this.$message({
            message: `批量删除完成，成功删除${success.length}条数据，删除失败${fail.length}条数据`,
            duration:3000
          })
          this.getList(1)
        })
      })
    },
    //新增数据
    submit() {
      this.$refs.form.validate((valid) => {
        if (valid) {
          this.form.indexId = this.form._id
          this.$http({
            url: "/admin/index",
            method:this.form.indexId ? 'PUT' : 'POST',///通过indexId判断新增还是修改
            data: this.form,
          }).then((res) => {
            if (!res.errorMsg) {
              this.dialogFormVisible = false;
              this.getList(this.form.indexId ? undefined : 1);
            }
          });
        }
      });
    },
    add() {
      ///初始化
      this.form = {
        _id: 0,
        img: "",
        type: "banner",
        url: "",
        title: "",
      };
      this.dialogFormVisible = true;
    },
    //修改数据
    edit(row) {
      this.form = row;
      this.dialogFormVisible = true;
    },
    openFile(){
      let fileElement = this.$refs.file
      fileElement.click()
    },
    changeFile(e){
      let files = e.target.files
      let formData = new FormData()
      formData.append('file',files[0])
      this.$http({
        url:'/upload',
        method:'POST',
        data:formData
      }).then(res => {
        if(res.path) this.form.img = api.baseURL + '/' + res.path.slice(0,7) + '/' + res.path.slice(8)
      })
    },
  },
  created(){
    this.getList()
      // this.$http('/admin/index/banner').then((banner) => {
      //   console.log(banner)
      // })
  },
  mounted(){

  }
}
</script>

<style scoped>
.date{
    width: 97%;
    height: 10%;
    background: #fff;
    position: absolute;
    top: 13%;
    left: 2%;
}
.el-form{
  position: absolute;
  left: 2%;
  top: 20%;
}
.r2{
  margin-top: 8%;
  margin-left: 2%;
}
.all{
    width: 40%;
    height: 6%;
    margin-top: 1%;
}
.dialog-footer{
  padding-top: 300px;
}
</style>
